Portion of a shoe upper



FIG. 1 is a front perspective view of a portion of a shoe upper showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a side view thereof; and,

FIG. 4 is a top view thereof.

The even broken line showing corresponds to stitching which is depicted for illustration purposes only and forms no part of the claimed design. The uneven broken line in the figures bounding the shaded region represents an unclaimed boundary of the design. The uneven broken line showing of the racetrack-shaped element and the trademark within the claimed region and of the remainder of the shoe is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a portion of a shoe upper, as shown and described. 